766215772 has 48 divisors (see below), whose sum is σ = 1650136320. Its totient is φ = 303812352.

The previous prime is 766215739. The next prime is 766215781. The reversal of 766215772 is 277512667.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14443 + ... + 41725.

It is an arithmetic number, because the mean of its divisors is an integer number (34377840).

Almost surely, 2^766215772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 766215772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (825068160).

766215772 is an abundant number, since it is smaller than the sum of its proper divisors (883920548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

766215772 is a wasteful number, since it uses less digits than its factorization.

766215772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27370 (or 27368 counting only the distinct ones).

The product of its digits is 246960, while the sum is 43.

The square root of 766215772 is about 27680.6028113551. The cubic root of 766215772 is about 915.0616666412.

The spelling of 766215772 in words is "seven hundred sixty-six million, two hundred fifteen thousand, seven hundred seventy-two".